https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97290
--- Comment #2 from Markus Rothe <markus.rothe at rite dot cc> --- I am writing the instructions on how the .o file is produced now. The instructions to fetch the files are wrong. This is correct: $ mkdir -p reproduce-tmp/CMakeFiles/aws-cpp-sdk-ec2.dir/ $ cd reproduce-tmp/ $ curl -o CMakeFiles/aws-cpp-sdk-ec2.dir/ub_EC2.cpp.o https://files.markus289.com/aifoo3/ub_EC2.cpp.o $ curl -o lm.res https://files.markus289.com/aifoo3/lm.res $ mv -- lm.res -lm.res $ tree . ├── CMakeFiles │ └── aws-cpp-sdk-ec2.dir │ └── ub_EC2.cpp.o └── lm.res 2 directories, 2 files